developer workbench

Free Online Developer Tools

Search one focused catalog for formatters, encoders, converters, generators, testers, and request debugging utilities.

Search Tools Privacy Proof

Local runtime: 0server uploads
Command shelf: 26browser tools
Fast paths: 5tool categories

No tools matched your search. Try terms like json, jwt, or regex.

category 01

Formatters & Editors

3 tools

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JSON Formatter

Format, validate, and beautify JSON instantly.

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SQL Formatter

Clean and indent SQL queries for readability.

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Diff Viewer

Compare text or JSON with inline and side-by-side highlighting.

category 02

Encoders & Decoders

4 tools

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JWT Decoder / Encoder

Decode payloads, verify signatures, test secrets, and generate JWT tokens.

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Base64 Encoder

Encode and decode Base64 strings instantly.

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URL Encoder

Encode or decode URLs safely and instantly.

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HTML Escape / Unescape

Escape or unescape HTML entities for safe embedding.

category 03

Converters

5 tools

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JSON to CSV

Convert JSON arrays into downloadable CSV format.

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CSV to JSON

Convert CSV data to JSON format instantly.

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YAML ↔ JSON

Convert between YAML and JSON without leaving the browser.

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Timestamp Converter

Convert between Unix timestamps and dates.

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Case Converter

Convert text between different cases instantly.

category 04

Generators

6 tools

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Password Generator

Generate strong, secure passwords in seconds.

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UUID Generator

Generate unique UUIDs for your applications.

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Hash Generator

Generate MD5, SHA1, SHA256 hashes securely.

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HMAC Generator

Generate HMAC digests using SHA-1/256/512.

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Color Palette Generator

Generate Tailwind palettes, CSS variables, and WCAG contrast checks.

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Slug Generator

Create SEO-friendly slugs from any title or phrase.

category 05

Testers & Analyzers

8 tools

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Regex Tester

Test your regular expressions instantly.

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Regex Library

Use ready regex patterns with explanations and built-in testing.

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Word Counter

Count words, characters, and analyze text.

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URL Query Parser

Inspect query parameters as key/value pairs.

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HTTP Status Explorer

Search HTTP status codes with examples, copy snippets, and API guidance.

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Cron Visual Builder

Build cron expressions visually with readable explanations and copy-ready output.

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API Request Builder

Build HTTP requests, generate cURL/fetch, and test responses.

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Cron Helper

Visualize cron field meanings and preview the next run times.

how the shelf works

Practical utilities without the tab sprawl

Private by default

Core transformations run in the browser, keeping pasted tokens, payloads, and drafts on your device.

Made for interruptions

Recent tools and focused categories make it quick to get back to a formatter, generator, or analyzer.

Built beside the guides

The tool index sits next to the engineering archive so references and utilities stay in the same workspace.